INCOME TAXES - Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Assets
Reserves related to discontinued operations and restructuring charges	$ 14	$ 24
Receivables (doubtful accounts and adjustments)	165	155
Accruals for retained insurance risks	195	205
Other long-term liabilities	35	39
Benefit plans	274	255
Other accrued liabilities	45	32
Interest expense limitation	219	89
Net operating loss carryforwards	179	266
Stock-based compensation	19	24
Other items	45	88
Deferred tax assets, gross	1,190	1,177
Valuation allowance	(281)	(148)	$ (72)
Deferred tax assets, net	909	1,029
Liabilities
Depreciation and fixed-asset differences	282	297
Intangible assets	356	341
Investments and other assets	95	83
Other items	34	32
Deferred tax liabilities, total	767	753
Reconciliation of the deferred tax assets and liabilities
Deferred income tax assets	169	312
Deferred tax liabilities	(27)	(36)
Net deferred tax asset	$ 142	$ 276